12" x 25' PVC Flexible Duct, Retracts Into Self-Contained Carry Bag Temperature Resistant to 180F, Positive or Negative Pressure Professional Grade PVC over Steel Spring Wire, Non-Collapsible Connect Multiple Ducts Without Connecting Collar, Meets ASTM 227 Easy to connect with another Mounto 12"x25' ducting by using the clamps itself PORTABLE BLOWER VENTILATOR FANS 25ft Ducting for 12" Diameter Fan Ducting easily converts Blower Fan (sold separately) to an exhaust fan with convenient, flexible ducting. Ducts include quick-connect Nylon Rope for easy blower attachment. Ducts are made with 2-ply reinforced polyvinyl that is flame retardant and withstands -20° to 180°F temperatures. 1 Year Limited Warranty.